"""
选择题
1.c
2.b
3.
4.
5.a
6.b
"""
#填空题
#1.
s = 'hello'
t = 'world'
s +=t
print(s)
print(s[-1])
#2
#3.(1)圆括号（2）方括号
#4    8
#5 {'name': None, 'age': None, 'weight': None, 'height': None}
#6 dict.valuer

